Method ensureHostCapacityLocked

client/cookiejar.go:360–394

ensureHostCapacityLocked bounds the number of stored hosts by evicting expired entries first and then one remaining host if the jar is still full.

(key string, now time.Time)

// ensureHostCapacityLocked bounds the number of stored hosts by evicting
// expired entries first and then one remaining host if the jar is still full.
func (cj *CookieJar) ensureHostCapacityLocked(key string, now time.Time) {
	if _, ok := cj.hostCookies[key]; ok || len(cj.hostCookies) < maxCookieJarHosts {
		return
	}

	for host, cookies := range cj.hostCookies {
		kept := cookies[:0]
		for _, sc := range cookies {
			if !sc.cookie.Expire().Equal(fasthttp.CookieExpireUnlimited) && sc.cookie.Expire().Before(now) {
				fasthttp.ReleaseCookie(sc.cookie)
				continue
			}
			kept = append(kept, sc)
		}
		if len(kept) == 0 {
			delete(cj.hostCookies, host)
			if len(cj.hostCookies) < maxCookieJarHosts {
				return
			}
			continue
		}
		cj.hostCookies[host] = kept
	}

	var evictHost string
	for host := range cj.hostCookies {
		if evictHost == "" || host < evictHost {
			evictHost = host
		}
	}
	if evictHost != "" {
		releaseStoredCookies(cj.hostCookies[evictHost])
		delete(cj.hostCookies, evictHost)
	}
}

// releaseStoredCookies releases pooled cookies for an evicted host entry.
func releaseStoredCookies(cookies []storedCookie) {